vdNote - Share noteworthy moments from YouTube videos.
Quick Code for Chrome - Get free online programming courses in new tab, everyday
Hubub - Host better conversations around video.
Dnote - Capture what you learn when you code everyday without switching context. Dnote is a home for your engineering microlessons.
Bookmark It - Create awesome notes on YouTube videos
Trilium Notes - Trilium Notes is a hierarchical note taking application.